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reflection

How-to articles, tricks, and solutions about REFLECTION

Calling a function of a module by using its name (a string)

To call a function from a module by using its name as a string, you can use the importlib module.

object python reflection

Can you find all classes in a package using reflection?

Yes, it is possible to find all classes in a package using reflection in Java.

java package reflection

Converting Integer to Long

To convert an Integer object to a Long object in Java, you can use the longValue() method of the Integer class, which returns the value of the Integer object as a long.

java reflection casting

Creating an instance using the class name and calling constructor

To create an instance of a class using its class name and calling its constructor, you can use the Class.forName method and the newInstance method.

java reflection instantiation

Get generic type of class at runtime

If you want to get the generic type of a class at runtime, you can use the Type class in the System namespace.

java reflection generics

Getting the name of the currently executing method

To get the name of the currently executing method in Java, you can use the Thread.currentThread().getStackTrace() method.

java methods reflection

How do I invoke a Java method when given the method name as a string?

To invoke a Java method when given the method name as a string, you can use reflection. Reflection is a feature of the Java language that allows you to inspect and manipulate classes, fields, and methods at runtime.

java reflection invoke

How to create a generic array in Java?

In Java, it is not possible to create a generic array directly. However, you can create an array of a specific type and then cast it to a generic type.

java arrays reflection generics instantiation

How to list all functions in a module?

To list all functions in a module, you can use the dir() function to get a list of all the names defined in the module, and then use the inspect module to check if each name is a function.

python reflection module inspect

Reflection generic get field value

To get the value of a generic field using reflection in Java, you can use the get() method of the Field class, which returns the value of the field as an Object.

java reflection

What could cause java.lang.reflect.InvocationTargetException?

The java.lang.reflect.InvocationTargetException is a checked exception that is thrown when an exception is thrown by an invoked method or constructor.

java exception reflection invoke

What is reflection and why is it useful?

Reflection is a feature of the Java language that allows you to inspect and manipulate classes, fields, and methods at runtime.

java reflection terminology